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Property, Plant and Equipment (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Summary of property held under capital leases
Land, buildings and support assets	$ 23,074	$ 21,616
Less: accumulated depreciation and amortization	(11,302)	(9,375)
Property held under capital leases, net	$ 11,772	$ 12,241

Property, plant, or equipment held under lease agreements classified as an asset.

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.